Ad-hoc Dynamic Radio-spectrum Exploitation via Multi-phase Radio (08081)

Project nummer: 08081

Omschrijving van het onderzoek

Radio spectrum is scarce and to exploit the available spectrum more efficiently, new techniques are very much wanted. One promising idea is to monitor the locally available spectrum, and use unused spectrum, but "step aside" if traditional radio services enter the picture. This asks for a smart agile radio transmitter/receiver, aware of its radio environment, referred to as a "Cognitive Radio". Towards this aim, we see three major challenges to be addressed:

A frequency scanner which quickly analyzes the locally available spectrum for white spaces
An agile radio transmitter using a modulation technique that can effectively use white spaces
A flexible radio receiver that can demodulate cognitive radio signals in the presence of strong interferers (incumbent services)

These are scientifically challenging goals, because fast frequency scanning over a wide band conflicts with accurate sensing. An agile radio transmitter is difficult because the transmitter should not cause interference in other frequency bands, while traditional fixed-frequency band-pass filters cannot be used (are not programmable). The receiver is difficult as it has to cope with very strong radio signals of traditional radio devices, putting high requirements on the linearity of the cognitive radio receivers. In this project we aim for innovations in the radio architecture to address the above mentioned challenges. In recent publications, we proposed a new CMOS multiphase multipath radio transmitter architecture without any dedicated filters, which seems very suitable for cognitive radio. In this project we want to explore this architecture and other ideas trying to show the feasibility of a cognitive radio in CMOS.

Gebruikers

No users' committee has been installed, yet.

Projectleider

Dr.ir. E.A.M. Klumperink
Universiteit Twente
Faculteit der Elektrotechniek, Wiskunde en Informatica
CTIT Integrated Circuit Design
Postbus 217
7500 AE Enschede

Status van het project

Startdatum:	16-12-2007
Einddatum:	31-12-2010

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